Study In Impact Coefficient Of Under-supported CFST Arch Bridge On The Matlab

CFST is widely applied in the long-span structure due to its excellent properties. Manyscholars home and abroad have conducted variety of theoretical researches and experimentalstudies. The application of CFST in the bridges solve the problem of high-strength materialand the constructing process in arch bridge, which lighten structure of arch bridges and injectnew vitality into the development of arch bridges. However, according to the present designparameter, there is no relevant given professional regulation on the impact property of CFST.Therefore, the designs of bridges still base on the highway bridge rules and the impactcoefficient of the fundamental frequency, whose appropriateness needs further identifing. Thisthesis reseaches on the axle coupling vibration response and impact coefficient of CFST archbridge.This thesis deduced the present study of several vehicle model of highway bridge axlecoupling vibration response. The road surface roughness of the bridge is considered as astationary random process characterized by a power spectral density function of the surfaceirregularity, employing trigonometric series superposition technique and fast Fourier inversetransfere technique, this thesis simulate grade A, B and C irregularities road surface.With the method of finite elements software-ANSYS and the characteristics ofunder-supported CFST Arch Bridge, this thesis studies the Binjiang Bridge in Taixing whichis an under-supported CFST Arch Bridge. This thesis simulating the components of CFSTarch rib (internal concrete and external steel tube), ties and beams with beam element beam4;he boom with tube unit link8; the bridge deck pavement with shell element shell63; thefabricated hollow slab of the bridge deck with solid45; thus, the author sets up the finiteelement model of the spatial computation of the bridge, and then obtains the each ordervibration frequency and vibration model data. The axle coupling vibration model of the archbridge is constructed under the action of a quarter vehicle model. MATLAB programming isemployed to analyze dynamic response of under-supported CFST arch bridge under themobile load condition. Consequently, vibration response of mechanics performances isobtained under different speed, lane, damping, road condition.According to the numerical simulation impact coefficient of the CFST arch bridge, theinfluencing factors of the bowstring arch bridge are analyzed. By comparing other countries’regulations and the researches on impact coefficient of CFST arch bridges of foreign scgolars,the feasibity of the highway bridge design on the impact coefficient is identified. Theconclusions and relevant research results provide reference for impact coefficient during thedesign, the researches of vehicles impact coefficient and load effect analysis of the later maintenance of the long-span CFST arch bridge.